Don't assume term-current-row cache is valid (Bug#31193)

* lisp/term.el (term-down): Call `term-current-row' instead of
directly accessing the variable `term-current-row.  Following a resize
of the terminal's window, `term-current-row' is reset to nil, so it is
not safe to assume it is a number.

1 files changed, 2 insertions, 2 deletions

diff --git a/lisp/term.el b/lisp/term.el
index 0a5efa4abc9..6860ea69342 100644
--- a/lisp/term.el
+++ b/lisp/term.el
@@ -3764,7 +3764,7 @@ all pending output has been dealt with."))
   (let ((start-column (term-horizontal-column)))
     (when (and check-for-scroll (or term-scroll-with-delete term-pager-count))
       (setq down (term-handle-scroll down)))
-    (unless (and (= term-current-row 0) (< down 0))
+    (unless (and (= (term-current-row) 0) (< down 0))
       (term-adjust-current-row-cache down)
       (when (or (/= (point) (point-max)) (< down 0))
         (setq down (- down (term-vertical-motion down)))))
@@ -3774,7 +3774,7 @@ all pending output has been dealt with."))
            (setq term-current-column 0)
            (setq term-start-line-column 0))
           (t
-           (when (= term-current-row 0)
+           (when (= (term-current-row) 0)
              ;; Insert lines if at the beginning.
              (save-excursion (term-insert-char ?\n (- down)))
              (save-excursion